Method, base station, and user terminal for implementing uplink resource indication

ABSTRACT

A method, a base station (BS), and a user terminal are provided for implementing uplink resource indication. The method includes carrying an uplink resource index in an uplink resource grant (UL Grant), in which an uplink resource index corresponds to at least one uplink resource in terms of indication; and sending the UL Grant. The BS includes an index carrying module and an instruction sending module. The user terminal includes an instruction receiving module, an instruction resolving module, and an execution module.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.13/105,555, filed on 11 May 2011, which is a continuation of U.S. patentapplication Ser. No. 12/504,239, filed on Jul. 16, 2009, which is acontinuation of International Application No. PCT/CN2008/071926, filedon Aug. 7, 2008. The International Application claims priority toChinese Patent Application No. 200710140544.8, filed on Aug. 9, 2007.All of the afore-mentioned patent applications are hereby incorporatedby reference in their entireties.

FIELD OF THE DISCLOSURE

The present disclosure relates to the field of communications, and moreparticularly to a method, a base station (BS), and a user terminal forimplementing uplink resource indication.

BACKGROUND OF THE DISCLOSURE

Time Division Duplex (TDD) is a radio transmission mode on radiochannels. In the TDD mode, the transmission and reception are conductedin a time division manner, that is, the radio transmission based on theTDD mode realizes the time division multiplexing of uplink and downlinkchannels. The TDD mode is implemented by repeating Time DivisionMultiple Access (TDMA) frame structures periodically in time domains.For example, in Long Term Evolution (LTE), the 3GPP LTE has two TDDframe structures. The first frame structure is as shown in FIG. 1, inwhich a radio frame is composed by 20 slots, a period of a frame is 10ms, and every two slots form a subframe (SF). The second frame structureis as shown in FIG. 2, in which a period of a frame is also 10 ms, aframe is divided into two half-frames, each half-frame is composed byseven SFs, a guard interval is inserted between every two SFs, and aguard period (GP) is formed by a downlink pilot time slot (DwPTS), a GP,and an uplink pilot time slot (UpPTS).

In the frame structure in the TDD mode, one frame includes several SFsor slots. The SFs may be classified into uplink SFs and downlink SFs,and a TDD system may use a transfer point to change the SF typesflexibly. For example, the current 3GPP LTE standard specifies variousSF ratios in the two frame structures. FIG. 3 is a schematic view ofvarious uplink and downlink SF ratios in the first frame structure, inwhich the ratios in one frame are illustrated. FIG. 4 is a schematicview of various uplink and downlink SF ratios in the second framestructure, in which the ratios in one and a half frames are illustrated.A table of uplink and downlink SF ratios (as shown in Table 1) can beconcluded from FIGS. 3 and 4. Table 1 lists the situation of onetransfer point, that is, the situation that the uplink and downlink SFshave only one type transfer.

TABLE 1 Uplink and Downlink SF Ratios Frame Structure (Downlink:Uplink)First Frame Structure 4:1, 3:2, 9:1, 6:4, 7:3, 8:2, 10:0, 2:2, 4:2, 2:3,1:4 Second Frame Structure 6:1, 5:2, 4:3, 3:4, 2:5, 1:6

According to different service requirements, the TDD system needs toindicate the uplink resources to which some uplink instructions aredirected in the uplink instructions. For example, in downlinktransmission of a 3GPP Evolved Universal Terrestrial Radio Access(E-UTRA) system, an Orthogonal Frequency Division Multiplexing (OFDM)technology is employed to realize multiple access. The OFDM is amulti-carrier communication technology. In a multi-carrier communicationsystem, different time domain and frequency domain resources are grantedto different users to realize multiplexing of time-frequency resourcesby multiple users. Here, the time-frequency resources may be granted bycarrying resource grant indications of corresponding uplink SFs (ULGrant) in downlink control signaling of a user. A UL Grant may containdifferent contents. Table 2 lists the content of a UL Grant.

TABLE 2 5 MHz UL Occupied Domain Bits Content Resource Grant 9Continuous physical resource blocks granted to a user TransmissionFormat 7 Transmission format indication, Indication/Transmission Blockmodulation and information bits number Size + Modulation Code Format andcode formats Hybrid Automatic Retransmission 2 Synchronous HARQ: 2-3bits of serial Request (HARQ) number and implicit confirmation ofprevious transmission blocks Power Control 2 Relative instructions PilotInstruction 1 Whether the pilot appears in the last long block (fromother user terminals) or whether the last long block is adapted totransmit data Channel Quality Indication 1 The quality indication reportabout the channel scheduling should be included in the data ACK/NACKIndication 1 Indicating that the user terminal should reserve resourcesfor ACK/NACK on the physical uplink synchronous channel Multi-antennaTechnology 2 Determined by multi-user MIMO and uplink multi-antennatechnology, 2 bits User Terminal Identity + Cyclic 20 16-24-bit CRCRedundancy Check (CRC)

Generally, a base station (BS) adopts downlink SFs to send the UL Grantas shown in Table 2. After receiving the ul grant, each user determineswhether the user identity in the UL Grant is consistent with theidentity of each user itself; and if they are consistent, the usergrants the resources according to the UL Grant. Thus, the resources canbe granted to all users. For a user, when the downlink SFs are more thanthe uplink SFs, each of the downlink SFs is mapped to one uplink SF,that is, the downlink SF may be configured to send a UL Grant for oneuplink SF. However, the frame structure in the TDD system may beasymmetrical in terms of the uplink and downlink ratio, as shown inTable 1, that is, one downlink SF may be corresponding to multipleuplink SFs, so that the corresponding uplink SF cannot be determinedaccording to one UL Grant. In this case, a downlink SF needs to beconfigured to send multiple UL Grants, so that one downlink SF iscorresponding to multiple uplink SFs, and the UL Grants will be sentseparately. In other words, for the same user, if it is determined thatn uplink SFs are required after scheduling, n corresponding UL Grantsexist, which will be transmitted repeatedly. Thus, the information suchas the user identity is also repeatedly transmitted for n times,resulting in the waste of transmission resources such as signaling andchannels.

It is known from the above analysis that the existing method forimplementing uplink resource indication in the TDD system cannotindicate the uplink resources corresponding to the UL Grants precisely,which may cause the waste of the resources and lead to a low utilizationof the resources.

SUMMARY

Accordingly, the present invention provides a method, a base station(BS), and a user terminal for implementing uplink resource indication.

A method for implementing uplink resource indication includes:

An uplink resource index is carried in a UL Grant, in which the uplinkresource index corresponds to at least one uplink resource in terms ofindication.

The UL Grant is sent.

A BS for implementing uplink resource indication includes an indexcarrying module and an instruction sending module.

The index carrying module is configured to carry an uplink resourceindex in a UL Grant, in which the uplink resource index corresponds toat least one uplink resource in terms of indication.

The instruction sending module is configured to send the UL Grant.

A user terminal for implementing uplink resource indication includes aninstruction receiving module, an instructing resolving module, and anexecution module.

The instruction receiving module is configured to receive a UL Grantfrom a BS, in which the UL Grant carries an uplink resource index, andthe uplink resource index corresponds to at least one uplink resource interms of indication.

The instruction resolving module is configured to resolve the uplinkresource index from the UL Grant received by the instruction receivingmodule.

The execution module is configured to obtain the at least one uplinkresource corresponding to the uplink resource index resolved by theinstruction resolving module according to a corresponding relationbetween the uplink resource index and the at least one uplink resourceobtained in advance, and perform the resource grant on the obtained atleast one uplink resource.

It is known from the above technical solutions that the method, BS, anduser terminal for implementing uplink resource indication according tothe embodiments of the present invention realize accurate indication ofthe at least one uplink resource through the uplink resource index,prevent repeated transmission of the same information in multiple uplinkresources, effectively reduce the signaling overhead, and increase theresource utilization.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood from the detaileddescription given herein below for illustration only, and thus are notlimitative of the present invention, and wherein:

FIG. 1 is a schematic view of a first frame structure in the prior art;

FIG. 2 is a schematic view of a second frame structure in the prior art;

FIG. 3 is a schematic view of various uplink and downlink RF ratios inthe first frame structure in the prior art;

FIG. 4 is a schematic view of various uplink and downlink RF ratios inthe second frame structure in the prior art;

FIG. 5 is a schematic flow chart of a method for implementing uplinkresource indication according to a first embodiment of the presentinvention;

FIG. 6 is a schematic flow chart of a method for implementing uplinkresource indication according to a second embodiment of the presentinvention;

FIG. 7 is a schematic structural view of a BS for implementing uplinkresource indication according to a third embodiment of the presentinvention;

FIG. 8 is a schematic structural view of a user terminal according to athird embodiment of the present invention;

FIG. 9 is a schematic view of a frame structure according to anembodiment of the present invention;

FIG. 10 is a schematic view of various uplink and downlink RF ratios ina TDD frame structure according to an embodiment of the presentinvention;

FIG. 11 is a schematic flow chart of a method for implementing uplinkresource indication according to a fifth embodiment of the presentinvention; and

FIG. 12 is a schematic flow chart of a method for implementing uplinkresource indication according to a sixth embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to make the objectives, technical solutions, and beneficialeffects of the present invention comprehensible, embodiments of thepresent invention are described in detail below with reference to theaccompanying drawings.

A method according to an embodiment of the present invention includesthe following steps. An uplink resource index is carried in a UL Grant,in which the uplink resource index is corresponding to at least oneuplink resource in terms of indication. Then, the UL Grant is sent.

In the embodiment of the present invention, the uplink resource may be atime domain resource such as an uplink slot or an uplink SF, or otherresource blocks such as a frequency domain resource block. The uplink SFis taken as an example below to illustrate the present invention.

FIG. 5 is a schematic flow chart of a method for implementing uplinkresource indication according to a first embodiment of the presentinvention.

In Step 501, a corresponding relation between an uplink resource indexand at least one uplink resource in terms of indication is established.

The method for establishing the corresponding relation between theuplink resource index and the at least one uplink resource in terms ofindication includes the following steps. The at least one uplinkresource is combined into one group, and the uplink resources in eachgroup are not completely the same. Each group is corresponding to anuplink resource index, so as to establish the corresponding relationbetween the uplink resource index and the at least one uplink resourcein terms of indication.

In this embodiment, uplink resource indexes of different bits areapplied to different frame structures, so that different correspondingrelations between the uplink resource index and at least one uplink SFcan be established. The establishing the corresponding relation betweenthe uplink resource index and the at least one uplink SF in terms ofindication in different circumstances is described in detail below.Persons skilled in the art should understand that only some specificexamples of the technical solutions according to the embodiments of thepresent invention are illustrated below, and the present invention isnot limited thereto.

In a first case, for the frame structure shown in FIG. 2, the UL Grantsupports the indication of discontinuous uplink SFs, and the uplinkresource index has four bits. Table 3 lists a combination in the firstcase. In this combination, one or two uplink SFs are combined into onegroup.

TABLE 3 Uplink DL:SF0, DL:SF0, SF6 DL:SF0, SF5~SF6 Resource UL:SF1~SF6UL:SF1~SF5 UL:SF1~SF4 Index (1:6) (2:5) (3:4) 0000 SF1 SF1 SF1 0001 SF2SF2 SF2 0010 SF3 SF3 SF3 0011 SF4 SF4 SF4 0100 SF5 SF5 SF1 and SF2 0101SF6 SF1 and SF2 SF1 and SF3 0110 SF1 and SF2 SF1 and SF3 SF1 and SF40111 SF1 and SF3 SF1 and SF4 SF2 and SF3 1000 SF1 and SF4 SF1 and SF5SF2 and SF4 1001 SF2 and SF4 SF2 and SF3 SF3 and SF4 1010 SF2 and SF5SF2 and SF4 Reserved 1011 SF3 and SF4 SF2 and SF5 Reserved 1100 SF3 andSF5 SF3 and SF4 Reserved 1101 SF3 and SF6 SF3 and SF5 Reserved 1110 SF4and SF6 SF4 and SF5 Reserved 1111 SF5 and SF6 Reserved Reserved

In a second case, for the frame structure shown in FIG. 2, the UL Grantsupports the indication of continuous uplink SFs, and the uplinkresource index has three bits. Table 4 lists a combination in the secondcase. In this combination, one or two uplink SFs are combined into onegroup.

TABLE 4 Uplink DL:SF0, DL:SF0, SF6 DL:SF0, SF5~SF6 Resource UL:SF1~SF6UL:SF1~SF5 UL:SF1~SF4 Index (1:6) (2:5) (3:4) 000 SF1 SF1 SF1 001 SF2SF2 SF2 010 SF3 SF3 SF3 011 SF4 SF4 SF4 100 SF5 SF5 SF1 and SF2 101 SF6SF1 and SF2 SF2 and SF3 110 SF3 and SF4 SF3 and SF4 SF3 and SF4 111 SF5and SF6 SF4 and SF5 Reserved

In a third case, for the frame structure shown in FIG. 1, the uplinkresource index has four bits. For the simplicity of illustration, onlythe uplink SFs are considered. In addition, for the convenience ofillustration, when there is only one uplink SF, the uplink SF isrepresented as ULSF1; and when there are two uplink SFs, the two uplinkSFs are represented as ULSF1 and ULSF2 respectively. The representationof other uplink SFs is similar. Table 5 lists a combination in the thirdcase.

TABLE 5 Uplink Resource Four Three Two One Zero Index ULSFs ULSFs ULSFsULSF ULSF 0000 ULSF1 ULSF1 ULSF1 Reserved Reserved 0001 ULSF2 ULSF2ULSF2 Reserved Reserved 0010 ULSF3 ULSF3 ULSF1 Reserved Reserved andULSF2 0011 ULSF4 ULSF1 Reserved Reserved Reserved and ULSF2 0100 ULSF1ULSF1 Reserved Reserved Reserved and and ULSF2 ULSF3 0101 ULSF1 ULSF2Reserved Reserved Reserved and and ULSF3 ULSF3 0110 ULSF1 ReservedReserved Reserved Reserved and ULSF4 0111 ULSF2 Reserved ReservedReserved Reserved and ULSF3 1000 ULSF3 Reserved Reserved ReservedReserved and ULSF4 1001 Reserved Reserved Reserved Reserved Reserved1010 Reserved Reserved Reserved Reserved Reserved 1011 Reserved ReservedReserved Reserved Reserved 1100 Reserved Reserved Reserved ReservedReserved 1101 Reserved Reserved Reserved Reserved Reserved 1110 ReservedReserved Reserved Reserved Reserved 1111 Reserved Reserved ReservedReserved Reserved

In a fourth case, for the frame structure shown in FIG. 1, the UL Grantsupports the indication of continuous uplink SFs, and the uplinkresource index has three bits. Table 6 lists a combination in the fourthcase.

TABLE 6 Uplink Resource Four Three Two One Zero Index ULSFs ULSFs ULSFsULSF ULSF 000 ULSF1 ULSF1 ULSF1 Reserved Reserved 001 ULSF2 ULSF2 ULSF2Reserved Reserved 010 ULSF3 ULSF3 ULSF1 Reserved Reserved and ULSF2 011ULSF4 ULSF1 Reserved Reserved Reserved and ULSF2 100 ULSF1 ULSF2Reserved Reserved Reserved and and ULSF2 ULSF3 101 ULSF2 ReservedReserved Reserved Reserved and ULSF3 110 ULSF3 Reserved ReservedReserved Reserved and ULSF4 111 Reserved Reserved Reserved ReservedReserved

In Step 502, the uplink resource index is carried in the UL Grant, andthe uplink resource index is corresponding to at least one uplinkresource.

In this embodiment, the UL Grant is that of the same user listed inTable 2, and the specific content of the UL Grant is shown in Table 7.

TABLE 7 5 MHz UL Occupied Domain Bits Content Resource Grant 9Continuous physical resource blocks granted to a user TransmissionFormat 7 Transmission format indication, Indication/Transmission Blockmodulation and information bits number Size + Modulation Code Format andcode formats HARQ 2 Synchronous HARQ: 2-3 bits of serial number andimplicit confirmation of previous transmission blocks Power Control 2Relative instructions Pilot Instruction 1 Whether the pilot appears inthe last long block (from other user terminals) or whether the last longblock is adapted to transmit data Channel Quality Indication 1 Thequality indication report about the channel scheduling should beincluded in the data ACK/NACK Indication 1 Indicating that the userterminal should reserve resources for ACK/NACK on the physical uplinksynchronous channel Multi-antenna Technology 2 Determined by multi-userMIMO and uplink multi-antenna technology, 2 bits User TerminalIdentity + CRC 20 16-24-bit CRC Uplink Resource Index 3 or 4 Uplinkresource indication

In Step 503, the UL Grant carrying the uplink resource index is sent.

In this embodiment, the UL Grant carrying the uplink resource index issent in a downlink SF.

In this embodiment, the optimal 3-bit or 4-bit uplink resource index isconfigured to indicate the uplink SF, and for the convenience ofillustration, only the combination of one or two uplink SFs isdescribed. Persons skilled in the art should understand that theembodiment of the present invention is not limited to the correspondingrelations between the uplink resource index and the uplink SF in termsof indication listed in Table 3 to Table 7.

After receiving the UL Grant carrying the uplink resource index from aBS, a user terminal resolves the uplink resource index from the ULGrant, and performs the resource grant on the at least one uplinkresource corresponding to the uplink resource index according to thecorresponding relation between the uplink resource index and the atleast one uplink resource in terms of indication obtained in advance.Here, after the BS establishes the corresponding relation in terms ofindication, the user terminal may obtain the corresponding relationbetween the uplink resource index and the at least one uplink resourcein terms of indication through static configuration or by dynamicallyacquiring from the BS.

In this embodiment, by carrying the uplink resource index in the ULGrant, one UL Grant of a user may indicate the resource grant ofmultiple uplink SFs. Thus, when an asymmetrical resource grant isperformed in the TDD mode, especially when the uplink SFs are more thanthe downlink SFs, the corresponding relation between the UL Grant andthe uplink SFs can be established. This embodiment realizes accurateindication of the at least one uplink resource through the uplinkresource index, prevents repeated transmission of the same informationin multiple uplink resources, effectively reduces the signalingoverhead, and increases the resource utilization.

FIG. 6 is a schematic flow chart of a method for implementing uplinkresource indication according to a second embodiment of the presentinvention.

In Step 601, all uplink resources are grouped in at least one uplinkresource set in advance.

In this embodiment, all of the uplink resources are grouped into atleast one uplink resource set according to the corresponding relationbetween the downlink SF for sending the UL Grant and the uplink SFs interms of indication.

In this embodiment, the frame structure in FIG. 2 is adopted, and thecorresponding relation between the downlink SFs and the uplink SF set interms of indication listed in Table 8 is set in advance. For example,when the uplink and downlink SF ratio is 4:3, if SF6 is configured tosend the UL Grant carrying the uplink resource index, the UL Grant isdirected to SF2; and if SF0 is configured to send the UL Grant carryingthe uplink resource index, the UL Grant is directed to SF3 and SF4.

TABLE 8 Uplink and Downlink SF Ratio (UL:DL) SF1 SF2 SF3 SF4 SF5 SF6 SF04:3 — — — — SF1 SF2 SF3 and SF4 5:2 — — — — — SF1 and SF3, SF4, SF2 andSF5 6:1 — — — — — — SF1, SF2, SF3, SF4, SF5, and SF6

In Step 602, a corresponding relation between an uplink resource indexand at least one uplink resource in terms of indication is established.

The corresponding relation between the uplink resource index and the atleast one uplink resource may be established as follows. The at leastone uplink resource in each uplink resource set is combined into onegroup, and the uplink resources in each group are not completely thesame. Each group in the same uplink resource set is corresponding to oneuplink resource index, so as to establish the corresponding relationbetween the uplink resource index and at least one uplink resource inthe same uplink resource group in terms of indication.

In this embodiment, for the frame structure shown in FIG. 2, accordingto the corresponding relation between the downlink SFs and the uplink SFset listed in Table 8, the uplink resource indexes in different bits areconfigured to establish the corresponding relation between differentuplink resource indexes and at least one uplink SF in terms ofindication. Two circumstances are described as follows.

In a first case, for the frame structure shown in FIG. 2, the uplinkresource index has four bits. Table 9 lists a combination in the firstcase.

TABLE 9 DL:SF0, SF6 DL:SF0, SF5~SF6 Uplink DL:SF0, UL:SF1~SF5 UL:SF1~SF4Resource UL:SF1~SF6 (2:5) (3:4) Index (1:6) SF6 SF0 SF5 SF6 SF0 0000 SF1SF1 SF5 Reserved SF3 0001 SF2 SF2 SF3 Reserved SF4 0010 SF3 SF1 and SF4and Reserved SF2 SF5 0011 SF4 Reserved SF4 and Reserved SF3 0100 SF5Reserved SF5 and Reserved SF3 0101 SF6 Reserved Reserved 0110 SF1 andSF2 Reserved Reserved 0111 SF1 and SF3 Reserved Reserved 1000 SF1 andSF4 Reserved Reserved 1001 SF2 and SF4 Reserved Reserved 1010 SF2 andSF5 Reserved Reserved 1011 SF3 and SF4 Reserved Reserved 1100 SF3 andSF5 Reserved Reserved 1101 SF3 and SF6 Reserved Reserved 1110 SF4 andSF6 Reserved Reserved 1111 SF5 and SF6 Reserved Reserved

In a second case, for the frame structure shown in FIG. 2, the UL Grantsupports the indication of discontinuous uplink SFs, and the uplinkresource index has three bits. Table 10 lists a combination in thesecond case.

TABLE 10 DL:SF0, SF6 DL:SF0, SF5~SF6 Uplink DL:SF0, UL:SF1~SF5UL:SF1~SF4 Resource UL:SF1~SF6 (2:5) (3:4) Index (1:6) SF6 SF0 SF5 SF6SF0 000 SF1 SF1 SF5 Reserved SF3 001 SF2 SF2 SF3 Reserved SF4 010 SF3SF1 and SF4 and Reserved SF2 SF5 011 SF4 Reserved SF4 and Reserved SF3100 SF5 Reserved SF5 and Reserved SF3 101 SF6 Reserved Reserved 110 SF1and SF2 Reserved Reserved 111 SF1 and SF3 Reserved Reserved

Certainly, in this embodiment, the frame structure shown in FIG. 1 mayalso be adopted. Thereby, the corresponding relation between thedownlink SFs and the uplink resource set listed in Table 11 may be setin advance in Step 601.

TABLE 11 Uplink and Downlink SF Ratio (DL:UL) DLSF0 DLSF1 1:4 ULSF0,ULSF1, — ULSF2, and ULSF3 2:3 ULSF0 and ULSF1 ULSF2 2:4 ULSF0 and ULSF1ULSF2 and ULSF3

For the frame structure shown in FIG. 1, according to the correspondingrelation between the downlink SFs and the uplink SF set listed in Table11, the uplink resource indexes in different bits are configured toestablish the corresponding relation between the uplink resource indexesand at least one uplink SF in terms of indication. Two circumstances aredescribed as follows.

In a first case, for the frame structure shown in FIG. 1, the UL Grantsupports the indication of discontinuous uplink SFs, and the uplinkresource index has four bits. Table 12 lists a combination in the firstcase.

TABLE 12 DL:DLSF0~1 DL:DLSF0~1 Uplink DL:DLSF0, UL:ULSF0~2 UL:ULSF0~3Resource UL:ULSF0~3 (2:3) (2:4) Index (1:4) DLSF0 DLSF1 DLSF0 DLSF1 0000ULSF1 ULSF0 Reserved ULSF0 ULSF2 0001 ULSF2 ULSF1 Reserved ULSF1 ULSF30010 ULSF3 Reserved Reserved 0011 ULSF0 Reserved Reserved 0100 ULSF1 andULSF2 Reserved Reserved 0101 ULSF1 and ULSF3 Reserved Reserved 0110ULSF1 and ULSF0 Reserved Reserved 0111 ULSF2 and ULSF3 Reserved Reserved1000 ULSF3 and ULSF0 Reserved Reserved 1001 Reserved Reserved Reserved1010 Reserved Reserved Reserved 1011 Reserved Reserved Reserved 1100Reserved Reserved Reserved 1101 Reserved Reserved Reserved 1110 ReservedReserved Reserved 1111 Reserved Reserved Reserved

In a second case, for the frame structure shown in FIG. 1, the UL Grantsupports the indication of discontinuous uplink SFs, and the uplinkresource index has three bits. Table 13 lists a combination in thesecond case.

TABLE 13 DL:DLSF0~1 DL:DLSF0~1 Uplink DL:DLSF0, UL:ULSF0~2 UL:ULSF0~3Resource UL:ULSF0~3 (2:3) (2:4) Index (1:4) DLSF0 DLSF1 DLSF0 DLSF1 000ULSF1 ULSF0 Reserved ULSF0 ULSF2 001 ULSF2 ULSF1 Reserved ULSF1 ULSF3010 ULSF3 Reserved Reserved 011 ULSF0 Reserved Reserved 100 ULSF1 andULSF2 Reserved Reserved 101 ULSF1 and ULSF3 Reserved Reserved 110 ULSF1and ULSF0 Reserved Reserved 111 ULSF2 and ULSF3 Reserved Reserved

In Step 603, the uplink resource index is carried in the UL Grant, andthe uplink resource index is corresponding to at least one uplinkresource.

In this embodiment, the uplink resource index for indicating the uplinkresource is carried in another UL Grant. The specific content is shownin Table 14.

TABLE 14 N_(RA-MAP) -bits 16-bits 4-bits 4-bits 1-bit 5-bits 3/4bitsSIMO-OL Resource User First Second Reserved Signaling Uplink TxDiv grantterminal code code related to resource identity word in word in HARQindex (CRC) multiple multiple Indicating code code which words wordsframe is scheduled in the TDD SIMO-CL Resource User First SecondPrecoding Signaling Uplink TxDiv grant terminal code code matrix relatedto resource identity word in word in indication HARQ index (CRC)multiple multiple and code code selection words words SU-MIMO- ResourceUser First Second Precoding Signaling Indicating 1CW grant terminal codecode matrix related to which identity word in word in indication HARQframe is (CRC) multiple multiple and scheduled code code selection inthe words words TDD SU-MIMO- Resource User First Second PrecodingSignaling Uplink 2CW grant terminal code code matrix related to resourceidentity word in word in indication HARQ index (CRC) multiple multipleand code code selection words words MU-MIMO Resource User First SecondPrecoding Signaling Indicating grant terminal code code matrix relatedto which identity word in word in indication HARQ frame is (CRC)multiple multiple and scheduled code code selection in the words wordsTDD BEAM- Resource User First Second Precoding Signaling Uplink FORMINGgrant terminal code code matrix related to resource identity word inword in indication HARQ index (CRC) multiple multiple and code codeselection words words

In Step 604, the UL Grant carrying the uplink resource index is sent.

In this embodiment, all uplink resources are grouped into at least oneuplink resource set, the uplink SF set corresponding to the UL Grant ispreliminarily determined according to the downlink SF for sending the ULGrant, and the specific uplink resources are indicated according to theuplink resource index added in the UL Grant.

In this embodiment, according to the preset corresponding relationbetween the downlink SFs and the uplink SF set, all of the uplink SFsare grouped into at least one uplink SF set. For uplink slots, accordingto the preset corresponding relation between the downlink slot and theuplink slot set, all of the uplink SFs are grouped into at least oneuplink slot set. In this case, the user terminal needs to obtain themode for grouping the uplink resource set statically or dynamically, andthe indicated uplink resource is determined according to the obtaineduplink resource set and the uplink resource index.

In the current 3GPP LTE standard, the resource grant is performed in adownlink acknowledgement (DLACK) mode, and the resources arecorresponding to the UL Grant one by one. When the resource grant ofmultiple uplink resources is represented by one UL Grant, data packetsof the uplink resources are corresponding to one acknowledgementchannel, which may carry information of only two bits. Therefore, inthis embodiment, one UL Grant can indicate the resource grant of at mosttwo uplink resources.

This embodiment realizes accurate indication of the at least one uplinkresource through the uplink resource index, prevents repeatedtransmission of the same information in multiple uplink resources,effectively reduces the signaling overhead, and increases the resourceutilization.

FIG. 7 is a schematic structural view of a BS for implementing uplinkresource indication according to a third embodiment of the presentinvention. The BS includes an index carrying module 701 and aninstruction sending module 702.

The index carrying module 701 is configured to carry an uplink resourceindex in a ul grant, in which the uplink resource index is correspondingto at least one uplink resource in terms of indication.

The instruction sending module 702 is configured to send the ul grantgenerated by the index carrying module 701.

The BS further includes a mapping module 703.

The mapping module 703 is configured to establish a correspondingrelation between an uplink resource index and at least one uplinkresource in terms of indication.

This embodiment realizes accurate indication of the at least one uplinkresource through the uplink resource index, prevents repeatedtransmission of the same information in multiple uplink resources,effectively reduces the signaling overhead, and increases the resourceutilization.

FIG. 8 is a schematic structural view of a user terminal according to afourth embodiment of the present invention. The user terminal includesan instruction receiving module 801, an instruction resolving module802, and an execution module 803.

The instruction receiving module 801 is configured to receive a UL Grantfrom a BS, in which the UL Grant carries an uplink resource index, andthe uplink resource index is corresponding to at least one uplinkresource in terms of indication.

The instruction resolving module 802 is configured to resolve the uplinkresource index from the UL Grant received by the instruction receivingmodule 801.

The execution module 803 is configured to obtain the at least one uplinkresource corresponding to the uplink resource index resolved by theinstruction resolving module 802 according to a corresponding relationbetween the uplink resource index and the at least one uplink resourcein terms of indication obtained in advance, and perform the resourcegrant on the obtained at least one uplink resource.

This embodiment realizes accurate indication of the at least one uplinkresource through the uplink resource index, prevents repeatedtransmission of the same information in multiple uplink resources,effectively reduces the signaling overhead, and increases the resourceutilization.

As shown in FIG. 9, a radio frame is composed by 20 slots, a period of aframe is 10 ms, a frame is divided into two half-frames, each half-frameis composed by five SFs, the first half-frame includes SF0-SF4, and thesecond half-frame includes SF5-SF9. SF1 and SF6 are respectively formedby a special downlink pilot time slot (DwPTS), a guard period (GP), andan uplink pilot time slot (UpPTS), and serve as transfer points ofuplink and downlink SFs. SF6 may also not be configured as a transferpoint. Thereby, the entire frame is used as a downlink frame.

In the frame structure in the TDD mode, one frame includes several SFsor slots. The SFs may be classified into uplink SFs and downlink SFs,and a TDD system may use a transfer point to transfer the SF typesflexibly. For example, in the current 3GPP LTE standard, different SFgrant ratios are specified. FIG. 10 is a schematic view of variousuplink and downlink SF ratios in the frame structure shown in FIG. 9.FIG. 10 lists seven configuration results of a frame. The frame includesten SFs, namely SF0-SF9. In different configurations, the uplink anddownlink SF ratios in a frame are different. A table of uplink anddownlink SF ratios (Table 15) is concluded from FIG. 10. Table 15 liststhe circumstances of one and two transfer points.

TABLE 15 Uplink and Downlink Ratio SF Number (Downlink: Configuration 01 2 3 4 5 6 7 8 9 Uplink) 0 Downlink Transfer Uplink Uplink UplinkDownlink Transfer Uplink Uplink Uplink 1:3 point point 1 DownlinkTransfer Uplink Uplink Downlink Downlink Transfer Uplink Uplink Downlink2:2 point point 2 Downlink Transfer Uplink Downlink Downlink DownlinkTransfer Uplink Downlink Downlink 3:1 point point 3 Downlink TransferUplink Uplink Uplink Downlink Downlink Downlink Downlink Downlink 6:3point 4 Downlink Transfer Uplink Uplink Downlink Downlink DownlinkDownlink Downlink Downlink 7:2 point 5 Downlink Transfer Uplink DownlinkDownlink Downlink Downlink Downlink Downlink Downlink 8:1 point 6Downlink Transfer Uplink Uplink Uplink Downlink Transfer Uplink UplinkDownlink 3:5 point point

FIG. 11 is a schematic flow chart of a method for implementing uplinkresource indication according to a fifth embodiment of the presentinvention.

In Step 1101, a corresponding relation between an uplink resource indexand at least one uplink resource in terms of indication is established.

The method for establishing the corresponding relation between theuplink resource index and the at least one uplink resource in terms ofindication is as follows. The at least one uplink resource is combinedinto one group, and the uplink resources in each group are notcompletely the same. Each group is corresponding to an uplink resourceindex, so as to establish the corresponding relation between the uplinkresource index and the at least one uplink resource in terms ofindication.

In this embodiment, uplink resource indexes of different bits are usedfor different frame structures, so different corresponding relationsbetween the uplink resource index and at least one uplink SF can beestablished. The establishing the corresponding relation between theuplink resource index and the at least one uplink SF in terms ofindication in different situations are described in detail below.Persons skilled in the art should understand that only some specificexamples of the technical solutions according to the embodiment of thepresent invention are described below, and the present invention is notlimited thereto.

For the frame structure shown in FIG. 10, the UL Grant supports theindication of continuous uplink SFs, and the uplink resource index hasthree bits. Table 16 lists a combination in a first case. In thiscombination, one or two uplink SFs are combined into one group.

TABLE 16 Uplink Uplink Resources Resource (3 Uplink SFs: Index SF2~SF4)000 SF2 001 SF3 010 SF4 011 SF2 and SF3 100 SF2 and SF4 101 SF3 and SF4110 Reserved 111 Reserved

In Step 1102, the uplink resource index is carried in the UL Grant, andthe uplink resource index is corresponding to at least one uplinkresource.

In this embodiment, the UL Grant is that of the same user listed inTable 2, and the specific content of the UL Grant is as listed in Table17.

TABLE 17 5 MHz UL Occupied Domain Bits Content Resource Grant 9Continuous physical resource blocks granted to a user TransmissionFormat 7 Transmission format indication, modulation andIndication/Transmission Block information bits number and code formatsSize + Modulation Code Format HARQ 2 Synchronous HARQ: 2-3 bits ofserial number and implicit confirmation of previous transmission blocksPower Control 2 Relative instructions Pilot Instruction 1 Whether thepilot appears in the last long block (from other user terminals) orwhether the last long block is adapted to transmit data Channel QualityIndication 1 The quality report about the channel scheduling should beincluded in the data ACK/NACK Indication 1 Indicating that the userterminal should reserve resources for ACK/NACK on the physical uplinksynchronous channel Multi-antenna Technology 2 Determined by multi-userMIMO and uplink multi-antenna technology, 2 bits User TerminalIdentity + CRC 20 16-24-bit CRC Uplink Resource Index 3 or 4 Uplinkresource indication

In Step 1103, the ul grant carrying the uplink resource index is sent.

In this embodiment, the ul grant carrying the uplink resource index issent in a downlink SF.

In this embodiment, the optimal 3-bit uplink resource index isconfigured to indicate the uplink SF, and for the convenience ofillustration, only the combination of one or two uplink SFs isdescribed. Persons skilled in the art should understand that theembodiment of the present invention is not limited to the correspondingrelations between the uplink SF index and the uplink SF in terms ofindication listed in Table 3 and Table 4.

After receiving the UL Grant carrying the uplink resource index from aBS, a user terminal resolves the uplink resource index from the ULGrant, and performs the resource grant on the at least one uplinkresource corresponding to the uplink resource index according to thecorresponding relation between the uplink resource index and the atleast one uplink resource in terms of indication obtained in advance.Here, after the BS establishes the corresponding relation in terms ofindication, the user terminal may obtain the corresponding relationbetween the uplink resource index and the at least one uplink resourcein terms of indication through static configuration or by dynamicallyacquiring from the BS.

In this embodiment, by carrying the uplink resource index in the ULGrant, one UL Grant of a user may indicate the resource grant ofmultiple uplink SFs. Thus, when an asymmetrical resource grant isperformed in the TDD mode, especially when the uplink SFs are more thanthe downlink SFs, the corresponding relation between the UL Grant andthe uplink SFs can be established. This embodiment realizes accurateindication of the at least one uplink resource through the uplinkresource index, prevents repeated transmission of the same informationin multiple uplink resources, effectively reduces the signalingoverhead, and increases the resource utilization.

FIG. 12 is a schematic flow chart of a method for implementing uplinkresource indication according to a sixth embodiment of the presentinvention.

In Step 1201, all uplink resources are grouped in at least one uplinkresource set in advance.

In this embodiment, all of the uplink resources are grouped into atleast one uplink resource set according to the corresponding relationbetween the downlink SF for sending the UL Grant and the uplink SFs interms of indication.

In this embodiment, the frame structure in FIG. 10 is adopted, and thecorresponding relation between the downlink SFs and the uplink SF set interms of indication listed in Table 18 is set in advance. For example,when the uplink and downlink SF ratio (UL:DL) is 3:1, if SF0 isconfigured to send the UL Grant carrying the uplink resource index, theUL Grant is directed to SF4 of the current period and SF2* of the nextperiod; and if SF1 is configured to send the UL Grant carrying theuplink resource index, the UL Grant is directed to SF2* and SF3* of thenext period.

TABLE 18 Uplink and Downlink SF Ratio (UL:DL) SF0 SF1 SF2 SF3 SF4 3:1SF4 and SF2* and — — — SF2* SF3*

In Step 1202, a corresponding relation between an uplink resource indexand at least one uplink resource in terms of indication is established.

The corresponding relation between the uplink resource index and the atleast one uplink resource may be established as follows. The at leastone uplink resource in each uplink resource set is combined into onegroup, and the uplink resources in each group are not completely thesame. Each group in the same uplink resource set is corresponding to oneuplink resource index, so as to establish the corresponding relationbetween the uplink resource index and at least one uplink resource inthe same uplink resource group in terms of indication.

In this embodiment, according to the corresponding relation between thedownlink SF and the uplink SF set, the uplink resource indexes indifferent bits are configured to establish the corresponding relationbetween different uplink resource indexes and at least one uplink SF interms of indication. For example, for the frame structure shown in FIG.10, the uplink resource index has two bits; and according to thecorresponding relation listed in Table 18, a combination listed in Table19 is obtained.

TABLE 19 Uplink DL:SF0, SF1 Resource UL:SF2~SF4 Index (DL:UL is 1:3) (2bit) SF0 SF1 00 SF4 SF2* 01  SF2* SF3* 10 SF4 and SF2* SF2* and SF3* 11Reserved Reserved

In Step 1203, the uplink resource index is carried in the UL Grant, andthe uplink resource index is corresponding to at least one uplinkresource.

In this embodiment, the uplink resource index for indicating the uplinkresource is carried in another UL Grant. The specific content is shownin Table 20.

TABLE 20 N_(RA-MAP)-bits 16-bits 4-bits 4-bits 1-bit 5-bits 2bitsSIMO-OL Resource User First Second Reserved Signaling Uplink TxDiv grantterminal code code related to resource identity word in word in HARQindex (CRC) multiple multiple Indicating code code which words wordsframe is scheduled in the TDD SIMO-CL Resource User First SecondPrecoding Signaling Uplink TxDiv grant terminal code code matrix relatedto resource identity word in word in indication HARQ index (CRC)multiple multiple and code code selection words words SU-MIMO- ResourceUser First Second Precoding Signaling Indicating 1CW grant terminal codecode matrix related to which identity word in word in indication HARQframe is (CRC) multiple multiple and scheduled code code selection inthe words words TDD SU-MIMO- Resource User First Second PrecodingSignaling Uplink 2CW grant terminal code code matrix related to resourceidentity word in word in indication HARQ index (CRC) multiple multipleand code code selection words words MU-MIMO Resource User First SecondPrecoding Signaling Indicating grant terminal code code matrix relatedto which identity word in word in indication HARQ frame is (CRC)multiple multiple and scheduled code code selection in the words wordsTDD BEAM- Resource User First Second Precoding Signaling Uplink FORMINGgrant terminal code code matrix related to resource identity word inword in indication HARQ index (CRC) multiple multiple and code codeselection words words

In Step 1204, the UL Grant carrying the uplink resource index is sent.

In this embodiment, all uplink resources are grouped into at least oneuplink resource set, the uplink SF set corresponding to the UL Grant ispreliminarily determined according to the downlink SF for sending the ULGrant, and the specific uplink resources are indicated according to theuplink resource index added in the UL Grant.

In this embodiment, according to the preset corresponding relationbetween the downlink SF and the uplink SF set, all of the uplink SFs aregrouped into at least one uplink SF set. For uplink slots, according tothe preset corresponding relation between the downlink slot and theuplink slot set in terms of indication, all of the uplink SFs aregrouped into at least one uplink slot set. In this case, the userterminal needs to obtain the mode for grouping the uplink resource setstatically or dynamically, and the indicated uplink resource isdetermined according to the obtained uplink resource set and the uplinkresource index.

In the current 3GPP LTE standard, the resource grant is performed in aDLACK mode, and the resources are corresponding to the UL Grants one byone. When the resource grant of multiple uplink resources is representedby one UL Grant, data packets of the multiple uplink resources arecorresponding to one acknowledgement channel, which may carryinformation of only two bits. Therefore, in this embodiment, one ULGrant can indicate the resource grant of at most two uplink resources.If too many packets are indicated, in the retransmission, the packetscannot be terminated at the same time, which makes the subsequentscheduling more complicated. Therefore, the comprehensive considerationof resource grant of two uplink resources is a reasonable processingmode.

This embodiment realizes accurate indication of the at least one uplinkresource through the uplink resource index, prevents repeatedtransmission of the same information in multiple uplink resources,effectively reduces the signaling overhead, and increases the resourceutilization.

All or a part of the content of the technical solutions according to theembodiments may be implemented through software programming. Thesoftware program is stored in a readable storage media, for example, ahard disk, an optical disk, or a floppy disk in a computer.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the present inventioncover modifications and variations of this invention provided they fallwithin the scope of the following claims and their equivalents.

What is claimed is:
 1. A method for implementing an uplink resourcegrant (UL Grant), comprising: obtaining, by a base station, acorresponding relationship between a plurality of downlink subframes, aplurality of uplink subframe sets correlated with the plurality ofdownlink subframes, and a plurality of values for an uplink resourceindex, wherein each uplink subframe set has at least one of a pluralityof groups, each group having a unique uplink subframe groupingspecifying at least one uplink subframe in the time domain; and sending,by the base station, an UL Grant to a user terminal on a first downlinksubframe of the plurality of downlink subframes, the UL Grant includinga first value of the plurality of values for said uplink resource index,wherein the first value corresponds to a first group in a first uplinksubframe set, and the first uplink subframe set corresponds to the firstdownlink subframe.
 2. The method of claim 1, the method furthercomprising: receiving, by the base station, data on each of the at leastone uplink subframe specified in the time domain in the first group. 3.The method of claim 1, wherein the corresponding relationship is setforth in a table.
 4. The method of claim 1, wherein each group has aunique uplink subframe grouping by defining a set of at least one uplinksubframe different from uplink subframe sets for other groups in theplurality of groups.
 5. The method of claim 1, wherein the uplinkresource index has a length of two bits.
 6. The method of claim 1,wherein the first group in the uplink subframe set comprises at leastone uplink subframe.
 7. A base station, comprising: a processor,configured to obtain a corresponding relationship between a plurality ofdownlink subframes, a plurality of uplink subframe sets correlated withthe plurality of downlink subframes, and a plurality of values for anuplink resource index, wherein each uplink subframe set has at least oneof a plurality of groups, each group having a unique uplink subframegrouping specifying at least one uplink subframe in the time domain; atransmitter, configured to send an uplink resource grant (UL Grant) to auser terminal on a first downlink subframe of the plurality of downlinksubframes, the UL Grant including a first value of the plurality ofvalues for an uplink resource index; wherein the first value correspondsto a first group in a first uplink subframe set, and the first uplinksubframe set corresponds to the first downlink subframe.
 8. The basestation of claim 7, further comprising: a receiver, configured toreceive data on each of the at least one uplink subframe specified inthe time domain in the first group.
 9. The base station of claim 7,wherein the corresponding relationship is set forth in a table.
 10. Thebase station of claim 7, wherein each group has a unique uplink subframegrouping by defining a set of at least one uplink subframe differentfrom uplink subframe sets for other groups in the plurality of groups.11. The base station of claim 7, wherein the uplink resource index isprovided with a length of two bits.
 12. The base station of claim 7,wherein the first group in the uplink subframe set comprises at leastone uplink subframes.
 13. A method for implementing an uplink resourcegrant (UL Grant) comprising: obtaining, by a processor, a correspondingrelationship between a plurality of downlink subframes, a plurality ofuplink subframe sets correlated with the plurality of downlinksubframes, and a plurality of values for an uplink resource index,wherein each uplink subframe set includes at least one of a plurality ofgroups, each group having a unique uplink subframe grouping specifyingat least one uplink subframe in the time domain; sending, by theprocessor, an uplink resource grant to a user terminal on a firstdownlink subframe of the plurality of downlink subframes, the UL Grantincluding a first value of the plurality of values for an uplinkresource index, wherein the first value corresponds to a first group ina first uplink subframe set, and the first uplink subframe setcorresponds to the first downlink subframe.
 14. The method of claim 13,wherein the corresponding relationship is set forth in a table.
 15. Themethod of claim 13, wherein each group has a unique uplink subframegrouping by defining a set of at least one uplink subframe differentfrom uplink subframe sets for other groups in the plurality of groups.16. An apparatus operable to implement an uplink resource grant,comprising: an obtaining module, configured to obtain a correspondingrelationship between a plurality of downlink subframes, a plurality ofuplink subframe sets correlated with the plurality of downlinksubframes, and a plurality of values for an uplink resource index,wherein each uplink subframe set comprises at least one of a pluralityof groups, each group having a unique uplink subframe groupingspecifying at least one uplink subframe in the time domain; a sendingmodule, configured to send an uplink resource grant (UL Grant) to a userterminal on a first downlink subframe of the plurality of downlinksubframes, the UL Grant including a first value of the plurality ofvalues for an uplink resource index; wherein the first value correspondsto a first group in a first uplink subframe set, and the first uplinksubframe set corresponds to the first downlink subframe.
 17. The methodof claim 16, wherein the corresponding relationship is set forth in atable.
 18. The method of claim 16, wherein each group comprises a uniqueuplink subframe grouping defining a set of at least one uplink subframedifferent from uplink subframe sets for other groups in the plurality ofgroups.
 19. A method for implementing an uplink resource grant,comprising: receiving, by an processor, an uplink resource grant (ULGrant) on one of a plurality of downlink subframes, the UL Grantincluding one of a plurality of values for an uplink resource index;identifying, by the processor, the downlink subframe on which theprocessor receives the value for the uplink resource index; inaccordance with a pre-defined relationship between the plurality ofdownlink subframes, a plurality of uplink subframe sets correlated withthe plurality of downlink subframes, the plurality of values for theuplink resource index, and a plurality of groups, identifying, by theprocessor, a group having at least one uplink subframe corresponding tothe received value for the uplink resource index, the identified groupbeing one group in the uplink subframe set corresponding to theidentified downlink subframe; and sending, by the processor, data oneach of the at least one uplink subframes specified in the time domainin the identified group; wherein the pre-defined relationship correlateseach of the plurality of values for the uplink resource index with arespective group in an uplink subframe set, wherein each uplink subframeset includes at least one of the plurality of groups, and wherein eachgroup includes a unique uplink subframe grouping specifying the at leastone uplink subframe in the time domain for use by the user terminal. 20.The method of claim 19, wherein the pre-defined relationship is setforth in a table.
 21. An apparatus operable to implement an uplinkresource grant (UL Grant), comprising: a receiving module, configured toreceive an UL Grant from a base station on one of a plurality ofdownlink subframes, the UL Grant including one of a plurality of valuesfor an uplink resource index; an identifying module, configured toidentify the downlink subframe on which the receiving module receivesthe value for the uplink resource index; in accordance with apre-defined relationship between the plurality of downlink subframes, aplurality of uplink subframe sets correlated with the plurality ofdownlink subframes, the plurality of values for the uplink resourceindex, and a plurality of groups, identifying, by the identifyingmodule, the group having at least one uplink subframe corresponding tothe received value for the uplink resource index, the identified groupbeing one group in the uplink subframe set corresponding to theidentified downlink subframe; and a sending module, configured to senddata on each of the at least one uplink subframes specified in the timedomain in the identified group; wherein the pre-defined relationshipcorrelates each of the plurality of values for the uplink resource indexwith a respective group in an uplink subframe set, wherein each uplinksubframe set includes at least one of the plurality of groups, andwherein each group includes a unique uplink subframe grouping specifyingthe at least one uplink subframe in the time domain for use by the userterminal.
 22. The apparatus of claim 21, wherein the pre-definedrelationship is set forth in a table.